Question

I have a Lambda where expression which filters a list of customer based on a ID passed in. This works fine however I want to remove the timestamp from the CreationDate field when I return the records. Is there anyway to do this within the Lambda expression?

So this is my Lambda expression which returns my customer records:

customers = customers.Where(c => c.Business_Type == businessType);

However I’d like to do something like the following:

customers = customers.Where(c => c.Business_Type == businessType, c.CreationDate=c.CreationDate.Value.ToShortDateString());

Answer 1

LINQ is not meant to perform mutation of sequence elements. Just take the return value of Where and use foreach to perform the mutation, which is the idiomatic way to handle this:

var customers = customers.Where(c => c.Business_Type == businessType).ToArray();
foreach(var c in customers)
{
    c.CreationDate = c.CreationDate.Value.ToShortDateString();
}